ncurses 4.2

[ncurses.git] / ncurses / fifo_defs.h

diff --git a/ncurses/fifo_defs.h b/ncurses/fifo_defs.h
new file mode 100644 (file)
index 0000000..f4dd7be
--- /dev/null
+++ b/ncurses/fifo_defs.h
@@ -0,0 +1,59 @@
+/****************************************************************************
+ * Copyright (c) 1998 Free Software Foundation, Inc.                        *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
+ *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ ****************************************************************************/
+
+/*
+ * Common macros for lib_getch.c, lib_ungetch.c
+ *
+ * $Id: fifo_defs.h,v 1.2 1998/02/11 12:13:56 tom Exp $
+ */
+
+#ifndef FIFO_DEFS_H
+#define FIFO_DEFS_H 1
+
+#define head   SP->_fifohead
+#define tail   SP->_fifotail
+/* peek points to next uninterpreted character */
+#define peek   SP->_fifopeek
+
+#define h_inc() { head == FIFO_SIZE-1 ? head = 0 : head++; if (head == tail) head = -1, tail = 0;}
+#define h_dec() { head == 0 ?  head = FIFO_SIZE-1 : head--; if (head == tail) tail = -1;}
+#define t_inc() { tail == FIFO_SIZE-1 ? tail = 0 : tail++; if (tail == head) tail = -1;}
+#define t_dec() { tail == 0 ?  tail = FIFO_SIZE-1 : tail--; if (head == tail) fifo_clear();}
+#define p_inc() { peek == FIFO_SIZE-1 ? peek = 0 : peek++;}
+
+#define cooked_key_in_fifo()   (head!=-1 && peek!=head)
+#define raw_key_in_fifo()      (head!=-1 && peek!=tail)
+
+#undef HIDE_EINTR
+
+#endif /* FIFO_DEFS_H */